These are little trees that have numbers at each corner. They are used to show the relationship between the numbers. You want your students to think: "I know 10 - 5 must be 5, because I know 5 + 5 i=10." Students can use these like flash cards. They help build fluency with addition and subtraction. You can print them on card stock, laminate, cut them out, and then put them together with a ring for a set of cards. You could also post them all the wall and make "The Forest of Math Facts."
-58 Trees Included